Analysis 05ppm zinc by atomic absorption digested and, Ask an Expert

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Analysis 0.5ppm zinc by atomic absorption digested and filtered into 100 mL volumetric diluted to volume. 5mL aliquot taken from 100mL volumetric added to another 100 mL volumetric and diluted to volume. Final = 0.5ppm zinc - what is the ppm zinc in the first sample?

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